Release Note: JEP 392: Packaging Tool

Provides the `jpackage` tool, for packaging self-contained Java applications. The `jpackage tool` was introduced as an incubating tool in JDK 14 by JEP 343. It remained an incubating tool in JDK 15, to allow time for additional feedback. It has been promoted in JDK 16 from incubation to a production-ready feature. As a consequence of this transition, the name of the `jpackage` module has changed from `jdk.incubator.jpackage` to `jdk.jpackage`.

For further details, see [JEP 392](https://openjdk.java.net/jeps/392).